If a sound wave of wavelength 0.1 cm is traveling in air at a speed of 343 m/s. Is it audible to human beings?

Yes

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Solution

The correct option is B
No

Given, Speed of the sound = 343 m/s

and, Wavelength = 0.1 cm= 0.001 m
We know that, Speed = Frequency x Wavelength
Thus, Frequency = $\frac{S p e e d}{W a v e l e n g t h}$ $= \frac{343 m s^{- 1}}{0.001 m} = 343000 H z$
As the frequency of the sound is beyond 20,000 Hz, it is beyond the audible range of humans.
Hence, the sound is inaudible to humans.

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